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Gardner, J. L. (2024). A Simplified Dynamical Framework for the Great Plains Nocturnal Low-Level Jet and Its Impact on Storm-Relative Helicity. Retrieved from https://purl.lib.fsu.edu/diginole/Gardner_fsu_0071N_18767
A simplified model of the Great Plains Nocturnal Low-level Jet (NLLJ) is formulated to include the classical inertial oscillation (Blackadar) and baroclinic (Holton) mechanisms. Time and height dependent solutions are analytically obtained with and without baroclinic forcing. Solutions are shown to be consistent with results from previous literature and observations. A novel application of this model is that it is applied to evaluate the temporal evolution of storm-relative helicity (SRH) overnight. That is, the NLLJ evolution is analytically linked to SRH_{0-1 km} to gauge its impact on magnitudes of environmental shear favorable for supercells and tornadoes. It is found that the NLLJ can contribute to sustaining SRH_{0-1 km} > 100 m^2 / s^2 for more than eight hours of the nocturnal period, provided there is sufficient baroclinic forcing to drive stronger amplitude oscillations of the winds.
A Thesis submitted to the Department of Earth, Ocean, and Atmospheric Science in partial fulfillment of the requirements for the degree of Master of Science.
Bibliography Note
Includes bibliographical references.
Advisory Committee
Jeff Chagnon, Professor Co-Directing Thesis; Ming Cai, Professor Co-Directing Thesis; Allison Wing, Committee Member; Robert Hart, Committee Member.
Publisher
Florida State University
Identifier
Gardner_fsu_0071N_18767
Gardner, J. L. (2024). A Simplified Dynamical Framework for the Great Plains Nocturnal Low-Level Jet and Its Impact on Storm-Relative Helicity. Retrieved from https://purl.lib.fsu.edu/diginole/Gardner_fsu_0071N_18767
